I have a servere problem concerning starting QGIS 2.14.3. I haved installed that version using OSGEO4W installer. Besides, I have QGIS 2.8.6 on my machine to keep the old LTR version. As it is mentioned in the error box the DLL could not find the right version, isn´t it? I checked for duplicates on dll´s in the windows system folders (even the hidden folders) - no success! Does anybody has an idea how I could solve that problem?
I've had the same problem, missing dll file's and several times reinstall Qgis 2.14 LTR. Solution with opening with the bat file did not work.
My problem has been solved by search on C-drive all Qgis file and uninstall and delete all files. Allso temp. files. After that a fress install of LTR and it works!